To rub noses with either a partner or lover, or a much loved pet animal, in an affectionate way, like the Eskimo kiss but with more gentitlity- unless it's a 'woodpecker snoo', which is a much faster, slightly more aggressive (but still pleasurable) action. Can also be the pet name of the person you regularly do it with.

A real creature, they are close relatives of the Blobfish, though Snoos do not live underwater, but in fact on top of the clouds. Literally. There are many different types of Snoos, like the Snooba family (Snoobini, Snoobette), Snooshie family (Snooshette, Snooshini) and the Flob family (Flobette, Flobini).
The Snooba family have large noses, blue and purple birth marks, pimples, moles and freckles. They are a pale pink, to reddish pink, to peach pink to salmon pink. Snoos live in Helvenworld, where there are many cities, towns and states, most of them named after Snoo families. The capital of Helvenworld is Helvenville, in the state of Helven.

Ylil: 'Gosh, this trip to Helvenville's taking ages!'
Enirehtac: 'Why of course it does! It's all the way up in the clouds! Read a book if you have to.'
Ylil: 'Wow, the Snoos must get car sick . . .'